<?php
/**
 * PHPExcel
 *
 * Copyright (c) 2006 - 2013 PHPExcel
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * @category   PHPExcel
 * @package    PHPExcel_Writer_Excel2007
 * @copyright  Copyright (c) 2006 - 2013 PHPExcel (http://www.codeplex.com/PHPExcel)
 * @license    http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt	LGPL
 * @version    1.7.9, 2013-06-02
 */


/**
 * PHPExcel_Writer_Excel2007_Drawing
 *
 * @category   PHPExcel
 * @package    PHPExcel_Writer_Excel2007
 * @copyright  Copyright (c) 2006 - 2013 PHPExcel (http://www.codeplex.com/PHPExcel)
 */
class PHPExcel_Writer_Excel2007_Drawing extends PHPExcel_Writer_Excel2007_WriterPart {
	/**
	 * Write drawings to XML format
	 *
	 * @param    PHPExcel_Worksheet $pWorksheet
	 * @param    int                &$chartRef     Chart ID
	 * @param    boolean            $includeCharts Flag indicating if we should include drawing details for charts
	 *
	 * @return    string                XML Output
	 * @throws    PHPExcel_Writer_Exception
	 */
	public function writeDrawings(PHPExcel_Worksheet $pWorksheet = null, &$chartRef, $includeCharts = false) {
		// Create XML writer
		$objWriter = null;
		if ($this->getParentWriter()->getUseDiskCaching())
		{
			$objWriter = new PHPExcel_Shared_XMLWriter(PHPExcel_Shared_XMLWriter::STORAGE_DISK, $this->getParentWriter()->getDiskCachingDirectory());
		}
		else
		{
			$objWriter = new PHPExcel_Shared_XMLWriter(PHPExcel_Shared_XMLWriter::STORAGE_MEMORY);
		}

		// XML header
		$objWriter->startDocument('1.0', 'UTF-8', 'yes');

		// xdr:wsDr
		$objWriter->startElement('xdr:wsDr');
		$objWriter->writeAttribute('xmlns:xdr', 'http://schemas.openxmlformats.org/drawingml/2006/spreadsheetDrawing');
		$objWriter->writeAttribute('xmlns:a', 'http://schemas.openxmlformats.org/drawingml/2006/main');

		// Loop through images and write drawings
		$i = 1;
		$iterator = $pWorksheet->getDrawingCollection()->getIterator();
		while ($iterator->valid())
		{
			$this->_writeDrawing($objWriter, $iterator->current(), $i);

			$iterator->next();
			++$i;
		}

		if ($includeCharts)
		{
			$chartCount = $pWorksheet->getChartCount();
			// Loop through charts and write the chart position
			if ($chartCount > 0)
			{
				for ($c = 0; $c < $chartCount; ++$c)
				{
					$this->_writeChart($objWriter, $pWorksheet->getChartByIndex($c), $c + $i);
				}
			}
		}


		$objWriter->endElement();

		// Return
		return $objWriter->getData();
	}

	/**
	 * Write drawings to XML format
	 *
	 * @param    PHPExcel_Shared_XMLWriter $objWriter XML Writer
	 * @param    PHPExcel_Chart            $pChart
	 * @param    int                       $pRelationId
	 *
	 * @throws    PHPExcel_Writer_Exception
	 */
	public function _writeChart(PHPExcel_Shared_XMLWriter $objWriter = null, PHPExcel_Chart $pChart = null, $pRelationId = -1) {
		$tl = $pChart->getTopLeftPosition();
		$tl['colRow'] = PHPExcel_Cell::coordinateFromString($tl['cell']);
		$br = $pChart->getBottomRightPosition();
		$br['colRow'] = PHPExcel_Cell::coordinateFromString($br['cell']);

		$objWriter->startElement('xdr:twoCellAnchor');

		$objWriter->startElement('xdr:from');
		$objWriter->writeElement('xdr:col', PHPExcel_Cell::columnIndexFromString($tl['colRow'][0]) - 1);
		$objWriter->writeElement('xdr:colOff', PHPExcel_Shared_Drawing::pixelsToEMU($tl['xOffset']));
		$objWriter->writeElement('xdr:row', $tl['colRow'][1] - 1);
		$objWriter->writeElement('xdr:rowOff', PHPExcel_Shared_Drawing::pixelsToEMU($tl['yOffset']));
		$objWriter->endElement();
		$objWriter->startElement('xdr:to');
		$objWriter->writeElement('xdr:col', PHPExcel_Cell::columnIndexFromString($br['colRow'][0]) - 1);
		$objWriter->writeElement('xdr:colOff', PHPExcel_Shared_Drawing::pixelsToEMU($br['xOffset']));
		$objWriter->writeElement('xdr:row', $br['colRow'][1] - 1);
		$objWriter->writeElement('xdr:rowOff', PHPExcel_Shared_Drawing::pixelsToEMU($br['yOffset']));
		$objWriter->endElement();

		$objWriter->startElement('xdr:graphicFrame');
		$objWriter->writeAttribute('macro', '');
		$objWriter->startElement('xdr:nvGraphicFramePr');
		$objWriter->startElement('xdr:cNvPr');
		$objWriter->writeAttribute('name', 'Chart ' . $pRelationId);
		$objWriter->writeAttribute('id', 1025 * $pRelationId);
		$objWriter->endElement();
		$objWriter->startElement('xdr:cNvGraphicFramePr');
		$objWriter->startElement('a:graphicFrameLocks');
		$objWriter->endElement();
		$objWriter->endElement();
		$objWriter->endElement();

		$objWriter->startElement('xdr:xfrm');
		$objWriter->startElement('a:off');
		$objWriter->writeAttribute('x', '0');
		$objWriter->writeAttribute('y', '0');
		$objWriter->endElement();
		$objWriter->startElement('a:ext');
		$objWriter->writeAttribute('cx', '0');
		$objWriter->writeAttribute('cy', '0');
		$objWriter->endElement();
		$objWriter->endElement();

		$objWriter->startElement('a:graphic');
		$objWriter->startElement('a:graphicData');
		$objWriter->writeAttribute('uri', 'http://schemas.openxmlformats.org/drawingml/2006/chart');
		$objWriter->startElement('c:chart');
		$objWriter->writeAttribute('xmlns:c', 'http://schemas.openxmlformats.org/drawingml/2006/chart');
		$objWriter->writeAttribute('xmlns:r', 'http://schemas.openxmlformats.org/officeDocument/2006/relationships');
		$objWriter->writeAttribute('r:id', 'rId' . $pRelationId);
		$objWriter->endElement();
		$objWriter->endElement();
		$objWriter->endElement();
		$objWriter->endElement();

		$objWriter->startElement('xdr:clientData');
		$objWriter->endElement();

		$objWriter->endElement();
	}

	/**
	 * Write drawings to XML format
	 *
	 * @param    PHPExcel_Shared_XMLWriter      $objWriter XML Writer
	 * @param    PHPExcel_Worksheet_BaseDrawing $pDrawing
	 * @param    int                            $pRelationId
	 *
	 * @throws    PHPExcel_Writer_Exception
	 */
	public function _writeDrawing(PHPExcel_Shared_XMLWriter $objWriter = null, PHPExcel_Worksheet_BaseDrawing $pDrawing = null, $pRelationId = -1) {
		if ($pRelationId >= 0)
		{
			// xdr:oneCellAnchor
			$objWriter->startElement('xdr:oneCellAnchor');
			// Image location
			$aCoordinates = PHPExcel_Cell::coordinateFromString($pDrawing->getCoordinates());
			$aCoordinates[0] = PHPExcel_Cell::columnIndexFromString($aCoordinates[0]);

			// xdr:from
			$objWriter->startElement('xdr:from');
			$objWriter->writeElement('xdr:col', $aCoordinates[0] - 1);
			$objWriter->writeElement('xdr:colOff', PHPExcel_Shared_Drawing::pixelsToEMU($pDrawing->getOffsetX()));
			$objWriter->writeElement('xdr:row', $aCoordinates[1] - 1);
			$objWriter->writeElement('xdr:rowOff', PHPExcel_Shared_Drawing::pixelsToEMU($pDrawing->getOffsetY()));
			$objWriter->endElement();

			// xdr:ext
			$objWriter->startElement('xdr:ext');
			$objWriter->writeAttribute('cx', PHPExcel_Shared_Drawing::pixelsToEMU($pDrawing->getWidth()));
			$objWriter->writeAttribute('cy', PHPExcel_Shared_Drawing::pixelsToEMU($pDrawing->getHeight()));
			$objWriter->endElement();

			// xdr:pic
			$objWriter->startElement('xdr:pic');

			// xdr:nvPicPr
			$objWriter->startElement('xdr:nvPicPr');

			// xdr:cNvPr
			$objWriter->startElement('xdr:cNvPr');
			$objWriter->writeAttribute('id', $pRelationId);
			$objWriter->writeAttribute('name', $pDrawing->getName());
			$objWriter->writeAttribute('descr', $pDrawing->getDescription());
			$objWriter->endElement();

			// xdr:cNvPicPr
			$objWriter->startElement('xdr:cNvPicPr');

			// a:picLocks
			$objWriter->startElement('a:picLocks');
			$objWriter->writeAttribute('noChangeAspect', '1');
			$objWriter->endElement();

			$objWriter->endElement();

			$objWriter->endElement();

			// xdr:blipFill
			$objWriter->startElement('xdr:blipFill');

			// a:blip
			$objWriter->startElement('a:blip');
			$objWriter->writeAttribute('xmlns:r', 'http://schemas.openxmlformats.org/officeDocument/2006/relationships');
			$objWriter->writeAttribute('r:embed', 'rId' . $pRelationId);
			$objWriter->endElement();

			// a:stretch
			$objWriter->startElement('a:stretch');
			$objWriter->writeElement('a:fillRect', null);
			$objWriter->endElement();

			$objWriter->endElement();

			// xdr:spPr
			$objWriter->startElement('xdr:spPr');

			// a:xfrm
			$objWriter->startElement('a:xfrm');
			$objWriter->writeAttribute('rot', PHPExcel_Shared_Drawing::degreesToAngle($pDrawing->getRotation()));
			$objWriter->endElement();

			// a:prstGeom
			$objWriter->startElement('a:prstGeom');
			$objWriter->writeAttribute('prst', 'rect');

			// a:avLst
			$objWriter->writeElement('a:avLst', null);

			$objWriter->endElement();

			//						// a:solidFill
			//						$objWriter->startElement('a:solidFill');

			//							// a:srgbClr
			//							$objWriter->startElement('a:srgbClr');
			//							$objWriter->writeAttribute('val', 'FFFFFF');

			///* SHADE
			//								// a:shade
			//								$objWriter->startElement('a:shade');
			//								$objWriter->writeAttribute('val', '85000');
			//								$objWriter->endElement();
			//*/

			//							$objWriter->endElement();

			//						$objWriter->endElement();
			/*
									// a:ln
									$objWriter->startElement('a:ln');
									$objWriter->writeAttribute('w', '88900');
									$objWriter->writeAttribute('cap', 'sq');
			
										// a:solidFill
										$objWriter->startElement('a:solidFill');
			
											// a:srgbClr
											$objWriter->startElement('a:srgbClr');
											$objWriter->writeAttribute('val', 'FFFFFF');
											$objWriter->endElement();
			
										$objWriter->endElement();
			
										// a:miter
										$objWriter->startElement('a:miter');
										$objWriter->writeAttribute('lim', '800000');
										$objWriter->endElement();
			
									$objWriter->endElement();
			*/

			if ($pDrawing->getShadow()->getVisible())
			{
				// a:effectLst
				$objWriter->startElement('a:effectLst');

				// a:outerShdw
				$objWriter->startElement('a:outerShdw');
				$objWriter->writeAttribute('blurRad', PHPExcel_Shared_Drawing::pixelsToEMU($pDrawing->getShadow()->getBlurRadius()));
				$objWriter->writeAttribute('dist', PHPExcel_Shared_Drawing::pixelsToEMU($pDrawing->getShadow()->getDistance()));
				$objWriter->writeAttribute('dir', PHPExcel_Shared_Drawing::degreesToAngle($pDrawing->getShadow()->getDirection()));
				$objWriter->writeAttribute('algn', $pDrawing->getShadow()->getAlignment());
				$objWriter->writeAttribute('rotWithShape', '0');

				// a:srgbClr
				$objWriter->startElement('a:srgbClr');
				$objWriter->writeAttribute('val', $pDrawing->getShadow()->getColor()->getRGB());

				// a:alpha
				$objWriter->startElement('a:alpha');
				$objWriter->writeAttribute('val', $pDrawing->getShadow()->getAlpha() * 1000);
				$objWriter->endElement();

				$objWriter->endElement();

				$objWriter->endElement();

				$objWriter->endElement();
			}
			/*
			
									// a:scene3d
									$objWriter->startElement('a:scene3d');
			
										// a:camera
										$objWriter->startElement('a:camera');
										$objWriter->writeAttribute('prst', 'orthographicFront');
										$objWriter->endElement();
			
										// a:lightRig
										$objWriter->startElement('a:lightRig');
										$objWriter->writeAttribute('rig', 'twoPt');
										$objWriter->writeAttribute('dir', 't');
			
											// a:rot
											$objWriter->startElement('a:rot');
											$objWriter->writeAttribute('lat', '0');
											$objWriter->writeAttribute('lon', '0');
											$objWriter->writeAttribute('rev', '0');
											$objWriter->endElement();
			
										$objWriter->endElement();
			
									$objWriter->endElement();
			*/
			/*
									// a:sp3d
									$objWriter->startElement('a:sp3d');
			
										// a:bevelT
										$objWriter->startElement('a:bevelT');
										$objWriter->writeAttribute('w', '25400');
										$objWriter->writeAttribute('h', '19050');
										$objWriter->endElement();
			
										// a:contourClr
										$objWriter->startElement('a:contourClr');
			
											// a:srgbClr
											$objWriter->startElement('a:srgbClr');
											$objWriter->writeAttribute('val', 'FFFFFF');
											$objWriter->endElement();
			
										$objWriter->endElement();
			
									$objWriter->endElement();
			*/
			$objWriter->endElement();

			$objWriter->endElement();

			// xdr:clientData
			$objWriter->writeElement('xdr:clientData', null);

			$objWriter->endElement();
		}
		else
		{
			throw new PHPExcel_Writer_Exception("Invalid parameters passed.");
		}
	}

	/**
	 * Write VML header/footer images to XML format
	 *
	 * @param    PHPExcel_Worksheet $pWorksheet
	 *
	 * @return    string                                XML Output
	 * @throws    PHPExcel_Writer_Exception
	 */
	public function writeVMLHeaderFooterImages(PHPExcel_Worksheet $pWorksheet = null) {
		// Create XML writer
		$objWriter = null;
		if ($this->getParentWriter()->getUseDiskCaching())
		{
			$objWriter = new PHPExcel_Shared_XMLWriter(PHPExcel_Shared_XMLWriter::STORAGE_DISK, $this->getParentWriter()->getDiskCachingDirectory());
		}
		else
		{
			$objWriter = new PHPExcel_Shared_XMLWriter(PHPExcel_Shared_XMLWriter::STORAGE_MEMORY);
		}

		// XML header
		$objWriter->startDocument('1.0', 'UTF-8', 'yes');

		// Header/footer images
		$images = $pWorksheet->getHeaderFooter()->getImages();

		// xml
		$objWriter->startElement('xml');
		$objWriter->writeAttribute('xmlns:v', 'urn:schemas-microsoft-com:vml');
		$objWriter->writeAttribute('xmlns:o', 'urn:schemas-microsoft-com:office:office');
		$objWriter->writeAttribute('xmlns:x', 'urn:schemas-microsoft-com:office:excel');

		// o:shapelayout
		$objWriter->startElement('o:shapelayout');
		$objWriter->writeAttribute('v:ext', 'edit');

		// o:idmap
		$objWriter->startElement('o:idmap');
		$objWriter->writeAttribute('v:ext', 'edit');
		$objWriter->writeAttribute('data', '1');
		$objWriter->endElement();

		$objWriter->endElement();

		// v:shapetype
		$objWriter->startElement('v:shapetype');
		$objWriter->writeAttribute('id', '_x0000_t75');
		$objWriter->writeAttribute('coordsize', '21600,21600');
		$objWriter->writeAttribute('o:spt', '75');
		$objWriter->writeAttribute('o:preferrelative', 't');
		$objWriter->writeAttribute('path', 'm@4@5l@4@11@9@11@9@5xe');
		$objWriter->writeAttribute('filled', 'f');
		$objWriter->writeAttribute('stroked', 'f');

		// v:stroke
		$objWriter->startElement('v:stroke');
		$objWriter->writeAttribute('joinstyle', 'miter');
		$objWriter->endElement();

		// v:formulas
		$objWriter->startElement('v:formulas');

		// v:f
		$objWriter->startElement('v:f');
		$objWriter->writeAttribute('eqn', 'if lineDrawn pixelLineWidth 0');
		$objWriter->endElement();

		// v:f
		$objWriter->startElement('v:f');
		$objWriter->writeAttribute('eqn', 'sum @0 1 0');
		$objWriter->endElement();

		// v:f
		$objWriter->startElement('v:f');
		$objWriter->writeAttribute('eqn', 'sum 0 0 @1');
		$objWriter->endElement();

		// v:f
		$objWriter->startElement('v:f');
		$objWriter->writeAttribute('eqn', 'prod @2 1 2');
		$objWriter->endElement();

		// v:f
		$objWriter->startElement('v:f');
		$objWriter->writeAttribute('eqn', 'prod @3 21600 pixelWidth');
		$objWriter->endElement();

		// v:f
		$objWriter->startElement('v:f');
		$objWriter->writeAttribute('eqn', 'prod @3 21600 pixelHeight');
		$objWriter->endElement();

		// v:f
		$objWriter->startElement('v:f');
		$objWriter->writeAttribute('eqn', 'sum @0 0 1');
		$objWriter->endElement();

		// v:f
		$objWriter->startElement('v:f');
		$objWriter->writeAttribute('eqn', 'prod @6 1 2');
		$objWriter->endElement();

		// v:f
		$objWriter->startElement('v:f');
		$objWriter->writeAttribute('eqn', 'prod @7 21600 pixelWidth');
		$objWriter->endElement();

		// v:f
		$objWriter->startElement('v:f');
		$objWriter->writeAttribute('eqn', 'sum @8 21600 0');
		$objWriter->endElement();

		// v:f
		$objWriter->startElement('v:f');
		$objWriter->writeAttribute('eqn', 'prod @7 21600 pixelHeight');
		$objWriter->endElement();

		// v:f
		$objWriter->startElement('v:f');
		$objWriter->writeAttribute('eqn', 'sum @10 21600 0');
		$objWriter->endElement();

		$objWriter->endElement();

		// v:path
		$objWriter->startElement('v:path');
		$objWriter->writeAttribute('o:extrusionok', 'f');
		$objWriter->writeAttribute('gradientshapeok', 't');
		$objWriter->writeAttribute('o:connecttype', 'rect');
		$objWriter->endElement();

		// o:lock
		$objWriter->startElement('o:lock');
		$objWriter->writeAttribute('v:ext', 'edit');
		$objWriter->writeAttribute('aspectratio', 't');
		$objWriter->endElement();

		$objWriter->endElement();

		// Loop through images
		foreach ($images as $key => $value)
		{
			$this->_writeVMLHeaderFooterImage($objWriter, $key, $value);
		}

		$objWriter->endElement();

		// Return
		return $objWriter->getData();
	}

	/**
	 * Write VML comment to XML format
	 *
	 * @param    PHPExcel_Shared_XMLWriter              $objWriter  XML Writer
	 * @param    string                                 $pReference Reference
	 * @param    PHPExcel_Worksheet_HeaderFooterDrawing $pImage     Image
	 *
	 * @throws    PHPExcel_Writer_Exception
	 */
	public function _writeVMLHeaderFooterImage(PHPExcel_Shared_XMLWriter $objWriter = null, $pReference = '', PHPExcel_Worksheet_HeaderFooterDrawing $pImage = null) {
		// Calculate object id
		preg_match('{(\d+)}', md5($pReference), $m);
		$id = 1500 + (substr($m[1], 0, 2) * 1);

		// Calculate offset
		$width = $pImage->getWidth();
		$height = $pImage->getHeight();
		$marginLeft = $pImage->getOffsetX();
		$marginTop = $pImage->getOffsetY();

		// v:shape
		$objWriter->startElement('v:shape');
		$objWriter->writeAttribute('id', $pReference);
		$objWriter->writeAttribute('o:spid', '_x0000_s' . $id);
		$objWriter->writeAttribute('type', '#_x0000_t75');
		$objWriter->writeAttribute('style', "position:absolute;margin-left:{$marginLeft}px;margin-top:{$marginTop}px;width:{$width}px;height:{$height}px;z-index:1");

		// v:imagedata
		$objWriter->startElement('v:imagedata');
		$objWriter->writeAttribute('o:relid', 'rId' . $pReference);
		$objWriter->writeAttribute('o:title', $pImage->getName());
		$objWriter->endElement();

		// o:lock
		$objWriter->startElement('o:lock');
		$objWriter->writeAttribute('v:ext', 'edit');
		$objWriter->writeAttribute('rotation', 't');
		$objWriter->endElement();

		$objWriter->endElement();
	}


	/**
	 * Get an array of all drawings
	 *
	 * @param    PHPExcel $pPHPExcel
	 *
	 * @return    PHPExcel_Worksheet_Drawing[]        All drawings in PHPExcel
	 * @throws    PHPExcel_Writer_Exception
	 */
	public function allDrawings(PHPExcel $pPHPExcel = null) {
		// Get an array of all drawings
		$aDrawings = array();

		// Loop through PHPExcel
		$sheetCount = $pPHPExcel->getSheetCount();
		for ($i = 0; $i < $sheetCount; ++$i)
		{
			// Loop through images and add to array
			$iterator = $pPHPExcel->getSheet($i)->getDrawingCollection()->getIterator();
			while ($iterator->valid())
			{
				$aDrawings[] = $iterator->current();

				$iterator->next();
			}
		}

		return $aDrawings;
	}
}
